A Review of Theories and Models of Design

Abstract

This paper intends to provide an overview of the rich legacy of models and theories that have emerged in the last fi fty years of the relatively young discipline of design research, and identifies some of the major areas of further research. It addresses the following questions: Whatare the major theories and models of design? How are design theory and model defined, and what is their purpose? What are the criteria they must satisfy to be considered a design theory or model? How should a theory or model of design be evaluated or validated? What are the major directions for further research?